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Finding the Fourth Proportional to 6,999.36, 9,658.72 and 3,855.36

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Solution

The fourth proportional to 6,999.36, 9,658.72 and 3,855.36 is: 5,320.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,999.36 : 9,658.72 = 3,855.36 : x
  2. Step 2: Convert to fraction form
    6,999.36/9,658.72 = 3,855.36/x
  3. Step 3: Cross multiply
    6,999.36x = 9,658.72 × 3,855.36
  4. Step 4: Simplify right side
    6,999.36x = 37,237,842.74
  5. Step 5: Solve for x
    x = 37,237,842.74/6,999.36
  6. Step 6: Final answer
    x = 5,320.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.